Volume IV (1988) - Flora of New Zealand Naturalised Pteridophytes, Gymnosperms, Dicotyledons
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Adiantum raddianum C.Presl

*A. raddianum C. Presl Tent. Pteridogr. 158 (1836).

Rhizomes creeping, scaly. Stipes and rachises glabrous except at very base. Laminae ovate or elliptic, 12-30 × 6-18 cm, 3-4-pinnate at base. Primary pinnae alternate, 9-12 on each side of rachis. Ultimate pinnules very variable in size and shape, generally longer than broad, narrowly obovate, obovate, broadly obovate, or rhombic, 5-17 × 3-16 mm, cuneate at base, with stalk attached ± centrally, most divided into 2 or more distinct lobes, glabrous, bright green. Indusia ± reniform with prominent sinuses, glabrous, 1-8 per pinnule on outer margin only.

N.: Auckland City, Taranaki (Pukearuhe), Wellington (Paekakariki, Ballance).

American tropics 1981

Clay banks in coastal localities or by streams.

This is a widely cultivated plant with many cvs, often known by the more familiar, but illegitimate name, A. cuneatum Langsd. et F. Fischer. It is now established in several places around Auckland City where it may be confused with A. aethiopicum but is distinguished by its more divided frond, and its ultimate pinnules which are slightly longer than broad and divided into distinct lobes.

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